package com.deplume.ssm.util;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * Created by libing on 2016/8/18.
 */
public class MyUtil {
    public static String getIpAddress(HttpServletRequest request){
        String ip = null;
        ip = request.getHeader("x-forwarded-for");
        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
        {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
            ip = request.getRemoteAddr();
            if(ip.equals("127.0.0.1"))
            {
                //根据网卡取本机配置的ip
                InetAddress inetAddress = null;
                try {
                    inetAddress = InetAddress.getLocalHost();
                }catch (UnknownHostException e){
                    e.printStackTrace();
                }
                ip = inetAddress.getHostAddress();
            }
        }

        /*
        * 对于通过多个代理的情况，第一个ip为客户端的真实ip，多个ip按照，分割
        * */
        if(ip != null && ip.length()>15)
        {
            if(ip.indexOf(",")>0){
                ip = ip.substring(0,ip.indexOf(","));
            }
        }
        return ip;
    }
}
